In this high-octane fourth book in the New York Times bestselling Dorothy Must Die series, Amy Gumm must do everything in her power to save Kansas and make Oz a free land once more.At the end of YELLOW BRICK WAR, Amy had finally defeated Dorothy. Just when she and the rest of the surviving members of Revolutionary Order of the Wicked thought it was safe to start rebuilding the damaged land of Oz, they realized they've been betrayed-by one of their own. And Dorothy might not have been so easily defeated after all.The magical Road of Yellow Brick comes to the rescue, whisking Amy away-but to where? Does the Road itself know where she needs to go to find the help that she needs?